I found this recipe on http://www.epicurious.com.  We use a lot of it, and it keeps a long time, so I quadruple the recipe when I make it.  The quadruple amounts are in parentheses.

Worcestershire Sauce:

1/2 cup (2 cups) apple cider vinegar

2 Tblesps (1/2 cup) tamari soy sauce (San-J brand–this is just made with soy–no wheat)

2 Tblesps (1/2 cup) water

1 Tblesp (1/4 cup) molasses (or yacon syrup)

1/4 tsp (1 tsp) ground ginger

1/4 tsp (1 tsp) dry mustard

1/4 tsp (1 tsp) onion powder

1/4 tsp (1 tsp) garlic powder

1/8 tsp (1/2 tsp) cinnamon

1/8 tsp (1/2 tsp) pepper

Place all ingredients in a medium saucepan and stir thoroughly. 

Bring to a boil, stirring constantly.  Simmer 1 minute. Cool.

Store in the refrigerator.

Makes 3/4 cup (3 cups).

Shake well before using.